Forney Mild Steel Mig Wire, 0.030 In. 10 Lb. is a high strength mild steel MIG (GMAW) welding wire designed for superior performance in auto body repair and fabrication on most ferrous metals. This wire contains a high level of manganese and silicon, which ensures a superior weld even on rusty or dirty steel surfaces. It produces a smooth bead that requires less grinding, making your welding projects more efficient. Please note that this wire is not for aluminum engines and requires Argon/CO2 shielding gas for optimal results. The wire is to be used with DCEP Reverse polarity and a tensile strength of 70,000 psi. Its bright yellow color code helps with easy identification during use. Model Number: 42286